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17 Cards in this Set
- Front
- Back
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Homeostasis |
A state of balance in which the body's internal environment remains in the normal range |
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Positive Feedback |
Process by which changes cause additional similar changes, producing unstable conditions |
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Negative Feedback |
Mechanism activated by imbalance that corrects the imbalance |
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Diffusion |
Random movement of molecules from a region of high concentration toward one of lower concentration |
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Osmosis |
Movement of water through a semipermeable membrane from the area of greater water concentration to an area of lesser water concentration |
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Active Transport |
Process that requires energy to move a substance across the cell membrane, usually against the concentration gradient |
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Hypotonic |
A solution with a lower osmotic pressure than the solution with which it is compared |
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Hypertonic |
A solution with the greater osmotic pressure than the solution with which it is compared |
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Isotonic |
A solution with the same osmotic pressure as the solution with which it is compared |
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Exocytosis |
Transport of substances out of a cell in membrane bounded vesicles |
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Endocytosis |
Process by which a cell membrane in both substance and draws it into the cell in a vesicle |
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Phagocytosis |
Process by which a cell engulfs and digests solids |
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Pinocytosis |
Process by which a cell engulfs droplets of fluid from its surroundings |
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Anabolism |
Synthesis of larger molecules from smaller ones; anabolic metabolism |
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Catabolism |
Breakdown of large molecules into smaller ones; catabolic metabolism |
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Dehydration Synthesis |
Anabolic process that joins small molecules by releasing the equivalent of a water molecule |
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Hydrolysis |
Enzymatically adding a water molecule to split a molecule into smaller portions |
